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TRANSCRIPT
TALKING CLOCK
Fall 2002 Semester
GROUP MEMBERS
Jas JhajjNeha PandyaCathy Wilcox
OVERVIEW
♦ Introduction♦ Prior Work♦ Regulations♦ Software Design ♦ Hardware Design
OVERVIEW
♦ Schematic♦ Problems Encountered♦ Conclusions♦ Questions
INTRODUCTION
♦ Purpose Statement:The purpose of this project was to create a clock
with features that enable the consumer to change the time and hear the current time being said with the push of a button.
PRIOR WORK
U.S. Patent 5,867,452:
Wrist watch
PRIOR WORK
U.S. Patent 5,663,714:
Digital Play Back Device
PRIOR WORK
U.S. Patent 6,190,329:
Thermo-scan
REGULATIONS
1910.304(a)(1):
Identification of conductors
REGULATIONS
1910.304(a)(3):
Use of grounding terminals and devices
TIME LINEDescription
3 10 17 24 1 8 15 22 29 5 12 19 26 3 10 17 24Group SelectionProject SelectionStart ProjectUnderstand RequirementsDefine Problem StatementConduct ResearchDevelop Objective TreeDefine Functional RequirementsGenerate AlternativesEvaluate AlternativesConduct TestDocument Design ProcessPresentationEnd ProjectStart Date: 10/26/02 Start Milestone PointEnd Date: 12/17/02 End Milestone PointPresentation Date: 12/10/02 Development Stages
Important Dates
September October November December
OBJECTIVE TREE
Inexpensive
Talking Clock
Follow Federal Regulations
MarketableDurable
Easy to operate
Simple Buttons
Accurate Time
Safe
Sealed Well
No Sharp Edges
SOFTWARE DESIGN
♦ Real-Time Clock♦ 26 Stored Messages in Ram♦ Talk Code
SOFTWARE DESIGN/PRECAUTIONS
♦ If we press the talk button, the microprocessor could pause incrementing the clock.
♦ Pressing the talk button more than once.
FLOW CHART
Store Time value
TY
Say ”The time is”
Say the hour valueY
Y
Y
N
N
N
D
D
D
Say the minute value
N
Y
HARDWARE/FUCTIONALITY
COST ANALYSISList of Parts Part Description Cost
Motorola Boards CME-11E9-EVBU Board $100.00
LCD Display Given $0
Voice ChipIC,ISD25120P Single Chip Voice Record/Playback Device-Jameco 141655
$9.95
Speaker Sony-16Ω Cordless Phone $0
Microphone From Speaker Phone 38 3S $0
Push Button Television Parts $0
Resistors/Capacitors
Various Resistors (1K,10K,100K,470K,6.1KΩ ) Various Capcitors (0.1,4.7,22,220 µF)
$0.99
Accessories Display Box $6.99
Total $117.93
Total without the board $17.93
TALKING CLOCK SCHEMATIC
DEMONSTRATION
PROBLEMS ENCOUNTERED
Problem 1:Finding a 16-ohm speaker
Solution 1:We used old parts.
PROBLEMS ENCOUNTERED
Problem 2:We were not receiving any output for the
speaker because the micro-controller did not recognize the memory locations where we had stored messages.
Solution 2:TBD
PROBLEMS ENCOUNTERED
Problem 3:The pins 3 and 7 of Port A are not
functioning.
Solution 3:We used some pins from Port D.
PROBLEMS ENCOUNTERED
Problem 4:The time delay between each segment of time
is inconsistent.
Solution 4:TBD
DESIGN ALTERNATIVES
♦ Holding – registers which indicate how to access the actual registers.
♦ Minimize the number of buttons. ♦ Use SPI.
PREPARING FOR THE MARKET
♦ Overall packaging of the talking clock could be more pleasing to the eye
♦ Include warning labels on the box♦ Creating a tightly-closed container
– child-proof
FOR FUTURE DESIGNS
1.Clock speaks the time as the time is being changed
FOR FUTURE DESIGNS
2. Incorporate an alarm option
FOR FUTURE DESIGNS
3. Recording feature
FOR FUTURE DESIGNS
4. For the vision-impaired, label each of the buttons in Braille
FOR FUTURE DESIGNS
5. Play a hourly chime
DIVISION OF WORKJas Jhajj Neha Pandya Cathy Wilcox
ProjectReal Time Clock
Software X X XHardware X
LCD DisplaySoftware X X
Talking ClockSoftware X
Final Hardware XDesign X X X
Project Report X
QUESTION / ANSWER SESSION